Perhaps, but I am not so sure…
@Agauger, this seems like a valid complaint. It seems that we could only determine if the face was designed if it showed tell tale artifacts of human design. Without seeing these tell tale signs, a human could have still done it (perhaps by choosing the right mountain and placing the other heads just so), but we would never know from evidence (unless of course we found diary that told us so).
Here is the problem though. There are no tell tale artifacts of human design in biological systems. So how do we determine if it designed? Honestly, the complexity we see in biology looks far more like Everest or Rushmore’s Fifth Face, than the presidential busts.
Finally, it does seems we have to know something about how design happens in order to detect it. Failing some model of design, we can’t really tell.